Does anybody have a CIF file of a polymorphous phase from Nb2O5? Maybe Nb12O29?

I'm trying to refine by Rietveld Method a Al2O3-AlNbO4-NaNbO3 system, and I'm having some problems with a reflection on 44-45 2theta. I've used all CIF files of AlNbO4 that I could find, but I'm...

10 July 2014 9,568 2 View